John mcooll



(No Model.

J McOOLL. Ore Concentrator.

Patented June 15,1880.

' INVENTOR:

WITNESSES N. FErm PHOTO-LITHOGRAPHER, WASHINGTON, D. 04

UNirEn STATES ATENT FFICEQ JOHN MGOOLL, OF SOUTH RYEGATE, VERMONT.

ORE-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 228,915, dated June 15, 1880.

Application filed March 10, 1880.

To all whom it may concern:

Beit known that I, JOHN MoGoLL, of South Ryegate, in the county of Caledonia and State of Vermont, have invented a new and Improved Ore-Ooncentrator, of which the following'is a specification.

The object of my invention is to provide a new and improved ore-concentrator for washing the impurities out of ore and depositing the ore in suitable receptacles.

The invention .consists in the combination, with two or more endless carriers provided with transverse riftles, of a hinged platform provided with amalgamated copper plates and perforated iron plates, upon which platform the crushed ore or pulp is fed, whereby the particles of ore drop through the perforations in the iron plates, the gold being held by the amalgamated copper plates of the platform and amalgamated copper rollers pivoted below the platform. From the platform the particles of ore drop. upon the upper endless carrier, are then washed off onto the lower carrier, and are then washed off from that, whereby the dirt and impurities are carried away by the waste-water, and the particles of metal are deposited in suitable receptacles.

In the accompanying drawings, Figure 1 is a plan view of my improved ore-concentrator, showing part of the top platform broken out. Fig. 2 is a longitudinal sectional elevation of the same on the line as :r, Fig. 1.

Similar letters of reference indicate correspondin g parts.

An inclinedplatibrm, A, composed of a number of amalgamated copper plates, B, and alternating iron plates 0, the latter provided with numerous perforations and having amalgamated copper plates inclined toward each other fastened to the under sides, so as to form the transverse gutters D D, with a central longitudinal slot in the bottom, is pivoted between two standards, E E, or some other suitable frame, and has its other end resting upon one or more cams, F F, which, when rotated, impart a jigging motion to the platform.

An amalgamated copper roller, G, provided with a pulley at one end, is pivoted below each gutter D, and an inclined chute, H, is arranged at the lower end of the platform A.

An endless carrier, I, made of felt and sup- (No model.)

ably provided with a strong nap, and the rollers J J are so arranged that the top of the carrier is inclined longitudinally, the same as the platform A. A sharp-edged skimmingblade, M, is pivoted in front of the roller J in such a manner that the sharp edge rests against the carrier I, and can skim 011' all the lighter and finer portions of the ore, and conducts them into a chute in front of the skimmer, as shown in dotted lines in Fig. 2.

Below the carrier I a second carrier, 0, made in exactly the same manner, and also supported by some strong fabric, rests on the end rollers, N N, the intermediate rollers, c c, the angular jiggers P P, and the tension-rollers Q, and R, of which Q is made adjustable in the manner described above. All the rollers over which the second or lower carrier passes are pivoted in a frame, S, pivoted between the standards U U at one end and adjustable at the other end on two slotted uprights, T T.

The inclination of the platform A and the upper carrier, 1, can be regulated by means of a bolt and nut passing through a slot, V, in the lower end of the standard E and taking in the main longitudinal beam W of the entire appa' ratus.

The operation is as follows: The pulleys of the several shafts and rollers are provided with belts to give them the motion necessary to operate the ore-concentrator, which belts must be soarranged that the carrier I moves in the direction of the arrow a, and the carrier O in the direction of the arrow 2. The pulp is fed upon the upper end of the platform A, to which a jigging motion is imparted by the cams F, thus causing the particles of ore to slide or jump down along the inclined platform. The gold is retained by the amalgamated copper plates B, and the particles of ore drop through the perforations in the plates 0 into the gutters D, and from these onto the amalgamated rollers G, which, with the gutters, retain the gold that may have passed the plates B. The coarser particles of ore, that cannot pass through the perforations in the plates 0, pass down theinclined platform into the chute H, and are conducted into a suitable receptacle, from where they are again brought into the stamping or crushing mill. The particles of ore drop from the rollers G onto the carrier I, which has been tightened as much as may be required by the roller K, and catch in the nap of the felt and in the transverse riffles. The skimmer M shims off the lighter and finer particles of ore and deposits them in a chute, which conducts them to some suitable receptacle. A perforated tube, which can throw a stream of water of the width of the carrier, is arranged near the highest point of the carrier 0, and in such a manner that the stream is directed against the lower side of the carrier I, where the same begins to rise after having passed the tensionroller K. All the ore, dirt, sand, 850., is thus washed off of the carrier I onto the carrier 0, leaving the former clean for the next deposit from the platform A. The water flows down the inclined carrier 0; but as the samemoves upwardthat is, in the opposite direction of the carrier I-all the heavier particles, especially the metals, are caughtin the nap and in the riffles, and are carried around the rollers N and Q, and are then washed off by a stream of water issuing from a perforated tube in the manner described above before the carrier reaches the second tension-roller, R. The waste-Water, which flows down the top of the carrier 0, is conducted off in some suitable manner, and the water containing the ore is collected in some suitable vessel or tank.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. An ore-concentrator made substantially as herein shown and described, and consistin g of a platform provided with amalgamated and perforated plates, and of two endless carriers arranged below said platform, as set forth.

2. In an ore-concentrator, the combination, with the platform A, provided with sieveplates 0, of the slotted gutters D and the rollers G, substantially'as herein shown and described, and for the purpose set forth.

3. In an ore-concentrator, the combination, with the platform A, provided with sieveplates (J, of the rollers G and the carriers I and 0, one being arranged above the other, substantially as herein shown and described,

v and for the purpose set forth.

JOHN MoOOLL. Witnesses:

GEORGE L. HALL, ALEXANDER DUNNE'IT. 

